环境科学与管理
環境科學與管理
배경과학여관리
ENVIRONMENTAL SCIENCE AND MANAGEMENT
2011年
12期
42-47
,共6页
重金属%沉积物%大沽口%EPA-3051
重金屬%沉積物%大沽口%EPA-3051
중금속%침적물%대고구%EPA-3051
heavy metals%sediment%Dagu Estuary%EPA-3051
采用U．S．EPA-3051方法测定了渤海湾海河大沽口表层沉积物中Cd、Pb、Zn、As、Cr、Mn、Ni和Cu等8种重金属元素的含量，并分析其污染水平及分布特点。结果表明，Cu和As是大沽口表层沉积物中主要的污染元素，其含量均高于渤海湾环境背景值，其它重金属元素含量与环境背景值相当，但所测元素均未超过海洋沉积物质量标准（GB18668—2002）第三类限定值。Cu的最大值65．57mg／kg出现在B10点，高于环境背景值2．5倍，Pb和Cd的含量在B6点也高于环境背景值，表明河口地区或靠近海岸的沉积物更容易受到来自陆源污染物的影响。
採用U．S．EPA-3051方法測定瞭渤海灣海河大沽口錶層沉積物中Cd、Pb、Zn、As、Cr、Mn、Ni和Cu等8種重金屬元素的含量，併分析其汙染水平及分佈特點。結果錶明，Cu和As是大沽口錶層沉積物中主要的汙染元素，其含量均高于渤海灣環境揹景值，其它重金屬元素含量與環境揹景值相噹，但所測元素均未超過海洋沉積物質量標準（GB18668—2002）第三類限定值。Cu的最大值65．57mg／kg齣現在B10點，高于環境揹景值2．5倍，Pb和Cd的含量在B6點也高于環境揹景值，錶明河口地區或靠近海岸的沉積物更容易受到來自陸源汙染物的影響。
채용U．S．EPA-3051방법측정료발해만해하대고구표층침적물중Cd、Pb、Zn、As、Cr、Mn、Ni화Cu등8충중금속원소적함량，병분석기오염수평급분포특점。결과표명，Cu화As시대고구표층침적물중주요적오염원소，기함량균고우발해만배경배경치，기타중금속원소함량여배경배경치상당，단소측원소균미초과해양침적물질량표준（GB18668—2002）제삼류한정치。Cu적최대치65．57mg／kg출현재B10점，고우배경배경치2．5배，Pb화Cd적함량재B6점야고우배경배경치，표명하구지구혹고근해안적침적물경용역수도래자륙원오염물적영향。
The concentrations of heavy metals （Cd, Pb, Zn, As, Cr, Mn, Ni, Cu） in the surficial sediments collected from Dagu estuary of Bohai Bay were determined with U. S. EPA-3051 method to evaluate pollution status and distribution. The results showed that Cu and As were considered as the major heavy metal pollutants in the surficial sediments, which were higher than the regional environmental background values. But they did not exceed the grade-three marine sediment quality of China （GB18668-2002）. The highest Cu concentration （65.57 mg/kg） was found at site BIO, which was about 2.5 times higher than that of the environmental background value. The concentrations of Pb and Cd at site B6 were also higher than the environmental background values. These results indicated that the sediments in the estuary and the adjacent sea area were polluted by land- sourced pollutants.
